Sink



FIG. 1 is a top front perspective of my new sink;

FIG. 2 is a front elevation;

FIG. 3 is a rear elevation;

FIG. 4 is a left side elevation, the right side being a mirror image thereof;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view. 

The ornamental design for a sink, as shown and described. 